Priming mixture



Patented Jan. 26, 1932 TENT JOSEPH D. MCNUTT, OF NEW HAVEN, CONNECTICUT, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO WINCHESTER REPEATING ARMS COMPANY, A CORPORATION OF MARY- LAND PRINTING MIXTURE No Drawing.

sists in a priming mixture characterized by the employment, as an oxygen-supplying element of a metallic chromate, either alone or in admixture with another oxidizing substance, preferable a metallic peroxid; as fuel element, a nitrated organic compound; and as detonating element, a metallic fulminate.

A suitable priming mixture may be formed, for instance, of mercury fulminate, tetranitroanilin and lead chromate in the following proportions Per cent Lead chromate 35 to 45 Mercury fulminate 30 to 40 Tetranitroanilin 10 to 15 Ground glass to 20 Per cent Mercury fulminate (dry weight) 25 to 40 Lead peroxid 20 to 40 Barium chromate r to Tetranitroanilin 3 to Ground glass 15 to 25 though these proportions may be varied as may be necessary to meet the requirements of various uses of the ultimate in re In proceeding to make my impr ing mixture, the peroxid, chroma t troanilin and ground glass are weighed om, sifted and mixed dry. A small portion a solution of gum is now added and mixed in. The fulminate in a dampened state is then weighed out and added to the above mixture, and the Whole, after E'ieing than Application filed October 5, 1927. Serial No. 224,281.

oughly mixed, is then used in the ordinary manner of such priming mixtures.

I also find that I may use other heavy metal oxids or nitrates such as barium dioxid or nitrate in place of the lead peroxid and I may substitute chromates of mercury for barium chromate or lead chromate. Also I may substitute trinitroresorcinol or other suitable nitrate organic substance in Whole or in part for the tetranitroanilin. Such substitutions, in whole or in part, fall Within the scope of my invention.

I claim:

1. A priming mixture, comprising to 40% of lead peroxid, 5% to 10% barium chromate, to of mercury fulminate, and 3% to l5% tetranitroanilin.

2. A priming mixture, comprisin 20% to 40% of lead peroxid, 5% to 10% arium chromate, 25% to 40% of mercury fulminate, 3% to 15% tetranitroanilin, and 15% to 25% ground glass.

In testimony whereof I aflix my signature.

JOSEPH D. McNUTT. 

